Remember, when President George Bush’s National Economic Council Director, Lawrence Lindsey, had told the country’s largest newspaper “The Wall Street Journal” that the war would cost between $100 billion and $200 billion, he had found himself under intense fire from his colleagues in the administration who claimed that this was a gross overestimation.
Consequently, Lawrence Lindsey was forced to resign. It is also imperative to recall that the Bush administration had claimed at the very outset that the Iraq war would finance itself out of Iraqi oil revenues, but Washington DC had instead ended up borrowing some $2 trillion to finance the two wars, the bulk of it from foreign lenders.
According to the Harvard University’s Kennedy School of Government 2013 report, this accounted for roughly 20 per cent of the total amount added to the US national debt between 2001 and 2012.
http://www.globalresearch.ca/us-wars-in-afghanistan-iraq-to-cost-6-trillion/5350789